alexa Dynamic Loosening and Tightening of a Single-Bolt Assembly
Engineering

Engineering

Journal of Steel Structures & Construction

Author(s): D P Hess, S V Sudhirkashyap

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Previous analyses of threaded fasteners under vibration are based on static equilibrium conditions with supporting data limited to low frequency loading. Such analyses predict only a net loosening action. This paper presents a dynamic model of a single-bolt assembly with moderate pre-load subjected to axial harmonic vibration. Simulations with this model predict that threaded fasteners can, on the average, loosen or tighten in the presence of vibration; and that the applied vibration, as well as other system parameters, can be tuned so that either action occurs. Measurements from a single-bolt assembly apparatus are presented and compared with the simulations.

This article was published in J. Vib. Acoust and referenced in Journal of Steel Structures & Construction

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